If you have purchased FileBot on the Microsoft Store or Mac App Store(before 1 Jan 2019) and want to use FileBot on a platform that is not supported by your purchase (e.g. Linux) then you may request a complimentary 1 year universal license.

I see that you purchased FileBot recently on the Mac App Store. If you have accidentally purchased it on the MAS without knowing it's limitations, please contact Apple Support for a refund immediately, so you can buy a life-time universal license instead.